Also if the bar to clear is 'evidence' of abuse, then this is yet another distortion of the estimate. Most abuse will surely smoulder without a shred of evidence, other than possibly the victim's testimony years later.
My conclusion as a Catholic is that the Church's hierarchy is just desperately flawed, at best a mix of non-negligible proportion of monsters and of conformists unwilling to tackle the evil, despite full awareness of it. At worst, well... Arguing about numbers when it's clear the Church has been harbouring sexual predators in huge numbers for decades is inappropriate, as far as I'm concerned.